JP2005185008A - Motor, sealed-type compressor, refrigerating air conditioner, wedge, and manufacturing method of the wedge - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a wedge from being broken in an assembly process of a motor, by eliminating the problem, wherein a wedge edge portion was broken from a folding portion in which the wedge edge portion is formed into a U shape during a process, under which stress is applied to the wedge at the time of assembling the motor, such as forming a coil end, to degrade yield of the motor, which used to be caused in the conventional wedge of which the longitudinal direction is formed into the U shape. <P>SOLUTION: In this motor, having a slot in which a winding is wound around an iron core made by layering thin steel plates, and a stator or a rotor having wedges inserted in between windings with various phases inserted so as to shield the openings which the slot has on an inner periphery side or a counter side of the iron core, or inserted in an identical slot, the folding portion for forming the wedge in the prescribed shape, is formed at a middle portion, except the surrounding of both the edge portions of the wedge. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention mainly relates to an electric motor used in a hermetic compressor mounted in a refrigerating and air-conditioning apparatus such as an air conditioner, a refrigerator, a refrigerator, or a dehumidifier. More specifically, the present invention relates to a wedge that insulates an iron core and a winding of a motor, and windings having different phases in a slot, and relates to a wedge that can suppress breakage during assembly of the motor.

In a conventional electric motor, the wedge material for insulating the iron core and winding of the motor, and windings of different phases in the slot, includes polyethylene terephthalate (hereinafter referred to as PET), aramid paper, polyimide film and polyethylene naphthalate Hereinafter, PEN) or the like is used, and the shape is formed in a U shape up to the end in the longitudinal direction (see, for example, Patent Document 1).
Japanese Patent No. 2886033

  The conventional wedge is formed in a U-shape in the entire longitudinal direction, and the wedge edge is broken from the fold formed in the U-shape in the process of applying stress to the wedge during motor assembly such as coil end molding. There was a problem of deteriorating the yield of electric motors.

  In addition, in a motor using a PEN film as a wedge, cracking and peeling are likely to occur due to the material characteristics of PEN, and the wedge edge is U-shaped during the process of applying stress to the wedge during motor assembly, such as during coil end molding. There was a problem that the folds formed in the above were torn, peeling occurred, and the yield of the motor was remarkably deteriorated.

  In addition, in a conventional hermetic compressor, when PET is used for insulating paper such as a motor wedge built in a hermetic container, depending on the use conditions of the compressor, the oligomer extracted from the PET in the refrigerant and refrigerating machine oil may be long. When used for a period of time, it may precipitate in the compressor and increase the suction resistance of the refrigerant and the mechanical resistance during compression, reducing the performance and reliability. If aramid paper or polyimide film with low oligomer extraction is used as the wedge material, Since the rigidity of the material is low, there is a problem that the wedge is bent when the wedge is inserted, and the manufacturing cost increases because the wedge cannot be automatically inserted.

  In addition, if PEN with low oligomer extraction is used as the material for the wedge, tearing and cracking increase compared to PET, so a large-scale device such as temperature control is required to improve the yield, resulting in increased costs. There was a problem.

  Further, in a conventional refrigeration system using a hermetic compressor, when PET is used for insulating paper such as a motor wedge built in the hermetic compressor, PET may be used for refrigerant and refrigerating machine oil depending on the use conditions of the compressor. The extracted oligomer may be deposited on a four-way valve, an electric expansion valve, a capillary tube or the like in the refrigeration system due to long-term use, which may deteriorate performance and operation.

  The present invention has been made in order to solve the above-described problems, and a first object is to prevent the occurrence of wedge breakage in the assembly process of the electric motor.

  A second object is to enable the use of PEN film as a wedge material without reducing the yield.

  A third object is to obtain a hermetic compressor capable of reducing oligomer extraction by using an electric motor using a PEN film as a wedge material.

  The fourth objective is to use an air conditioner, refrigerator, refrigerator, dehumidifier that can reduce the extraction of oligomers by using a hermetic compressor that uses a PEN film as the material for the built-in electric motor wedge. It is to obtain a refrigeration air conditioner such as a machine.

  A fifth object of the present invention is to provide a method for manufacturing a wedge in which the folds of the wedge are formed in an intermediate portion excluding the vicinity of both ends of the wedge.

  The electric motor according to the present invention has a slot for winding a winding around an iron core formed by laminating thin steel plates, and the slot has an opening on the inner diameter side or outer side of the iron core, and is inserted so as to close the opening. In a motor having a stator or a rotor having a wedge inserted between windings of different phases inserted in the same slot, a fold for forming the wedge into a predetermined shape, a wedge It was formed in the intermediate part except for the vicinity of both ends of the.

  In the electric motor of the present invention, since the fold for forming the wedge into a predetermined shape is formed in the intermediate portion except for the vicinity of both ends of the wedge, when the wedge is stressed during the assembly of the electric motor, the break generated from the fold of the wedge is prevented. It has the effect of preventing.

Embodiment 1 FIG.
1 to 8 are diagrams showing Embodiment 1, FIG. 1 is a cross-sectional plan view of the electric motor, FIG. 2 is a side view showing a part of the electric motor in cross section, FIG. 3 is an enlarged view of a slot portion, and FIG. FIG. 5 is a diagram showing a method for manufacturing a wedge, FIG. 6 is a flowchart showing a method for manufacturing a stator, FIG. 7 is a diagram showing a modified example of a punch for wedge forming, and FIG. 8 is for wedge forming It is a figure which shows the other modification of this punch.

  The motor shown in FIGS. 1 and 2 is a built-in motor including a stator 1 and a rotor 2. The stator 1 includes a stator core 3 in which thin electromagnetic steel sheets having a thickness of 0.5 mm or less are laminated, and a stator. A slot 5 for accommodating the winding 4 in the core 3, a slot cell 6 inserted into the slot for electrically insulating the stator core 3 and the winding 4, and an inner diameter side of the stator 1. From the slot opening 7 for inserting the winding 4 into the slot 5, the inserted winding 4 is inserted between the slot opening 7 and the winding 4 so as not to leak, or within the same slot 5. And a wedge 8 that insulates the windings of different phases, and when incorporated in a device, the center of the stator 1 and the center of the rotor 2 are substantially coaxial inside the stator 1. Are arranged as follows.

The rotor 2 is short-circuited by an end ring at both ends to a rotor core 9 in which thin magnetic steel sheets having a thickness of 0.5 mm or less are laminated and a rotor slot 10 provided in the rotor core, as in the case of the stator 1. The aluminum which is the secondary conductor made is cast and configured.
In addition, as shown in FIG. 2, the coil end portions 40 that extend to both ends in the axial direction of the stator 1 are bound by a binding thread 41.

  The wedge 8 is formed in a U shape as shown in FIG. 4, but the fold line 11 does not reach both ends of the wedge.

  Such a U-shaped wedge inserts a film as a material between the punch 12 and the die 13 shown in FIG. 5, is pushed along the die 13 by the punch 12, and is inserted into the magazine 14 at the tip. Is done. As a result, the fold 11 portion in contact with the punch 12 is plastically deformed and formed into a U shape. In this embodiment, in order to prevent the fold line 11 of the wedge 8 from reaching the end, the longitudinal corner of the punch 12 is curved, and the end of the wedge 8 is not subjected to the frictional force between the punch 12 and the die 13. Therefore, it does not deform plastically.

Next, the operation will be described.
A procedure for manufacturing the stator 1 of the electric motor configured as described above will be described with reference to the flowchart of FIG. The electric motor described here is a single-phase induction motor. First, the slot cell 6 is inserted into the stator core 3 (step S1), then the first phase winding 4 is inserted into the slot 5, and the wedge 8 is inserted (step S2). Next, the coil end portion 40 that has come out of the stator core 3 of the winding 4 is formed so that the second phase can be easily inserted. At this time, the wedge 8 receives stress due to the movement of the winding 4 (step). S3). Next, the second phase is inserted, and the wedge 8 is inserted as in the first phase (step S4). When the coil end portion 40 of the winding 4 is formed into a predetermined shape as in the first phase, The wedge 8 is stressed by the movement of the winding 4 (step S5).

  Although not shown, when there is a third phase, the wedge 8 is similarly stressed during the molding of the third phase. Further, when the coil end portion 40 is bound by the binding yarn 41 (step S6), the wedge 8 is similarly stressed by the movement of the winding 4 at the time of final molding for finally adjusting the coil end shape (step S7). .

  As described above, the fold line 11 when the wedge 8 is formed into a U-shape is prevented from reaching the edge of the wedge, so that even if the wedge 8 is subjected to stress, the crease 11 is used as a trigger to cause breakage. Can be suppressed. As a result, even if PEN, which is easily cracked or peeled due to material characteristics, is used as the material of the wedge 8, cracks generated from the fold of the wedge 8 can be suppressed and the yield can be dramatically improved.

  Although this embodiment has been described with a single-phase induction motor, all motors that have a wedge formed with a film, such as a three-phase induction motor, a brushless DC motor, or a synchronous reluctance motor, that stress the wedge during the manufacturing process. Needless to say, is the target.

  In the above embodiment, when the wedge 8 is formed in a U-shape, the longitudinal corners of the punch 12 are curved as shown in FIG. 5, but the longitudinal direction of the punch 12 is shown in FIG. The direction corner may be triangular. Furthermore, as shown in FIG. 8, the corners in the longitudinal direction of the punch 12 may be formed in a quadrangular shape.

Embodiment 2. FIG.
In the first embodiment, the yield of the motor is improved by preventing the breakage of the wedge of the electric motor, and it is possible to use a material that easily breaks such as PEN. Next, the hermetic compressor Embodiment 2 using the built-in type electric motor described in Embodiment 1 will be described.

  FIG. 9 is a view showing the second embodiment and is a longitudinal sectional view of a scroll compressor. In the figure, an electric element 60 is housed in the lower part and a compression element 70 is housed in the upper part in the sealed container 21. The outer periphery of the fixed scroll 15 is fastened to the guide frame 25 by bolts (not shown), and plate-like spiral teeth 15b are formed on one surface (lower side in the drawing) of the base plate portion 15a. At the same time, a pair of Oldham guide grooves 15c is formed on the outer peripheral portion substantially in a straight line, and a pair of fixed-side keys 20c of the Oldham mechanism 20 are reciprocally slid in the Oldham guide groove 15c. It is freely engaged.

  The orbiting scroll 16 is formed with plate-like spiral teeth 16b having substantially the same shape as the plate-like spiral teeth 15b of the fixed scroll 15 on one surface (upper side in the drawing) of the base plate portion 16a. A hollow cylindrical boss portion 16f is formed at the center of the surface of the portion 16a opposite to the plate-like spiral teeth 16b (lower side in the figure). A rocking bearing 16c is formed on the inner surface of the boss portion 16f.

  Further, a thrust surface 16d that can be slidably pressed against the thrust bearing 17a of the compliant frame 17 is formed on the outer peripheral portion of the surface on the same side as the boss portion 16f. A pair of Oldham guide grooves 16e having a phase difference of approximately 90 degrees with the Oldham guide groove 15c of the fixed scroll 15 are formed on the outer peripheral portion of the base plate portion 16a of the orbiting scroll 16 in a substantially straight line. The Oldham guide groove 16e is engaged with two pairs of swinging side keys 20a of the Oldham mechanism 20 so as to be slidable back and forth.

  Further, the base plate portion 16a has a thin hole which is a thin hole communicating the surface on the fixed scroll 15 (upper surface in FIG. 9) and the surface on the compliant frame 17 (lower surface in FIG. 9). A pore 16j is formed. The opening of the surface of the bleed hole 16j on the compliant frame side, that is, the lower opening 16k is positioned so that the circular locus always fits inside the thrust bearing 17a of the compliant frame 17 during normal operation.

  On the outside of the thrust bearing 17a of the compliant frame 17, a surface on which the Oldham mechanism annular portion 20b reciprocates is formed. Further, as shown in FIG. 9, a main bearing 17c and an auxiliary main bearing 17h that support the main shaft 18 that is rotationally driven by the electric motor in the radial direction are formed at the center of the compliant frame 17.

  The compliant frame 17 is formed with a communication hole 17s that communicates with the frame space 25f from the thrust bearing 17a at a position facing the lower opening 16k of the orbiting scroll 16. Further, the compliant frame 17 is provided with a valve 17t for adjusting the pressure of the boss outer diameter space 16h, a valve spring 17l, and an intermediate pressure adjusting valve space 17p for accommodating a spring 17m. The spring 17m is housed by being contracted from its natural length.

  As shown in FIG. 9, an upper fitting cylindrical surface 25 a is formed on the fixed scroll side (upper side in FIG. 9) on the inner surface of the guide frame 25, and the upper surface formed on the outer peripheral surface of the compliant frame 17. It is engaged with the fitting surface 17d. On the other hand, a lower fitting cylindrical surface 25b is formed on the motor side (lower side in FIG. 1) of the inner side surface of the guide frame 25, and a lower fitting cylindrical surface 17e formed on the outer peripheral surface of the compliant frame 17; Is engaged.

  A frame space 25f formed by the inner side surface of the guide frame 25 and the outer side surface of the compliant frame 17 is partitioned at its upper and lower portions by ring-shaped sealing materials 26a and 26b. Here, two ring-shaped seal grooves for accommodating the seal material are formed on the inner peripheral surface of the guide frame 25, but the seal grooves may be formed on the outer peripheral surface of the compliant frame 17. Further, the space on the outer peripheral side of the thrust bearing 17a surrounded by the base plate 2a of the orbiting scroll 16 and the compliant frame 17, that is, the base plate outer peripheral space 16i, is a low pressure space of the intake gas atmosphere (suction pressure). It has become.

  An oscillating shaft portion 18b that is rotatably engaged with the oscillating bearing 16c of the oscillating scroll 16 is formed at the end of the oscillating scroll side of the main shaft 18 (upper side in FIG. 9). A main shaft portion 18c that is rotatably engaged with the main bearing 17c and the auxiliary main bearing 17h of the compliant frame 17 is formed.

  Further, the other end portion of the main shaft 18 is formed with a sub shaft portion 18d that is rotatably engaged with the sub bearing 19a of the sub frame 19, and an electric motor (between the sub shaft portion 18d and the main shaft portion 18c is provided. The rotor 2 of the electric element 60) is shrink fitted.

  Further, an oil pipe 18 f is press-fitted into the lower end surface of the main shaft 18, and sucks up the refrigerating machine oil 21 e accumulated at the bottom of the sealed container 21. In addition, the motor stator 1 is shrink-fitted into the sealed container 21 and uses the motor described in the first embodiment. The wedge 8 is made of PEN and the wedge 8 is molded into a U shape. The fold line 11 is not made to reach the edge of the wedge.

  Next, the operation of this scroll compressor will be described. When a voltage is supplied to the stator 1, a current flows through the stator winding to generate a rotating magnetic field, and the rotor 2 rotates. Since the rotor 2 is shrink-fitted on the main shaft 18, the rotor 2 rotates in accordance with the rotation of the rotor 2 and swings the swing scroll 16. Thereby, the refrigerant sucked from the suction pipe 21a is compressed in the scroll and discharged into the sealed container 21 from the discharge port 15f provided in the upper part of the fixed scroll 15.

  A check valve 23 provided in the suction pipe 21a to prevent reverse rotation of the compressor closes the suction pipe 21a by the force of the check valve spring 23a, and reverses only by the differential pressure when rotating in the forward direction. The stop valve 23 operates to allow the refrigerant to circulate.

  The wedge 8 faces the space between the stator 1 and the rotor 2 serving as a refrigerant passage, and is the member most exposed to the refrigerant among the insulating materials of the electric motor. That is, making the wedge 8 a low oligomer material has a great effect on reducing oligomers precipitated in the refrigerant. In particular, in the case of chlorofluorocarbon (hereinafter referred to as HCFC) refrigerant, oligomer extraction is large and attention is required.

  In this electric motor, since PEN is used for the wedge 8, the oligomer extracted into the refrigerant is lower than when PET is used as the insulating material of the electric motor. As a result, the oligomer extracted by the refrigerant over a long period of time is deposited near the suction pipe, which increases the rotational resistance and deteriorates the performance by depositing on the sliding portion of the fixed scroll 15 and the swing scroll 16. Problems such as increasing the resistance and deteriorating the performance or obstructing the operation of the check valve 23 can be solved.

  As described above, by using the electric motor of the first embodiment for a scroll compressor, an electric motor using PEN as a wedge that is difficult to process without using a large facility can be used for the scroll compressor, and the yield is also high. Since it does not decrease, the cost of the scroll compressor can be reduced and the reliability of the scroll compressor can be improved.

Embodiment 3 FIG.
In the second embodiment, the example in which the electric motor of the first embodiment is applied to the scroll compressor has been described. However, the electric motor may be used for a rotary compressor.

  FIG. 10 shows the third embodiment and is a longitudinal sectional view of a rotary compressor. The electric element 60 having the stator 1 and the rotor 2 is arranged at the upper part of the sealed container 21, and the compression element 70 for compressing the refrigerant is arranged at the lower part of the sealed container 21. The inside of the sealed container 21 is a high-pressure refrigerant atmosphere compressed by a compression element.

  Even in a rotary compressor, by using PEN as the material of the wedge of the electric motor, less oligomers are extracted by the refrigerant than when PET is used. Thereby, the oligomer extracted with the refrigerant | coolant by long-term use deposits on a sliding part etc., and can reduce the influence which deteriorates performance.

Embodiment 4 FIG.
In the third embodiment, an example in which the electric motor of the first embodiment is applied to a rotary compressor has been described. However, the electric motor may be used for a reciprocating compressor.

  FIG. 11 shows the fourth embodiment and is a side view of a reciprocating compressor. The electric element 60 having the stator 1 and the rotor 2 is arranged at the upper part of the sealed container 21, and the compression element 70 for compressing the refrigerant is arranged at the lower part of the sealed container 21. The inside of the sealed container 21 is a low-pressure refrigerant atmosphere sucked from the low-pressure side of the refrigeration cycle.

  Even in the reciprocating compressor, the use of PEN as the material of the motor wedge reduces the amount of oligomer extracted by the refrigerant as compared with the case of using PET. Thereby, the oligomer extracted with the refrigerant | coolant by long-term use deposits on a sliding part etc., and can reduce the influence which deteriorates performance.

Embodiment 5 FIG.
In the first to fourth embodiments, the effects obtained by the electric motor and the compressor using the electric motor have been described. Next, when the hermetic compressors of the second to fourth embodiments are incorporated in a refrigeration system. Embodiment 5 in which reliability as a refrigeration system is improved will be described.

  FIG. 12 is a schematic configuration diagram showing a refrigeration cycle of an air conditioner, for example. In the figure, the hermetic compressor 30 uses PEN as the wedge material described in the second to fourth embodiments so that the fold when the wedge is formed into a U shape does not reach the edge of the wedge. Any of a scroll compressor, a rotary compressor, and a reciprocating compressor using

  The refrigeration cycle shown in FIG. 12 includes a hermetic compressor 30, a four-way valve 31 that switches the flow of refrigerant from the hermetic compressor 30, an outdoor heat exchanger 32, a decompression device 33 such as electric expansion, and indoor heat exchange. The accumulator 35 that is connected to the suction pipe 34 of the compressor 34 and the hermetic compressor 30 and stores the refrigerant is sequentially connected through the pipe to form a refrigeration cycle. In the figure, the solid line indicates the direction of the refrigerant flow during the heating operation, and the broken line indicates the direction of the refrigerant flow during the cooling operation.

  Next, the operation of the refrigeration cycle configured as described above will be described in the order of the heating operation and the cooling operation. When the heating operation is started, the four-way valve 31 is connected to the solid line side in FIG. 12, so the high-temperature and high-pressure refrigerant compressed by the hermetic compressor 30 flows into the indoor heat exchanger 34, condenses, and liquefies. After that, the pressure is reduced by the decompression device 33 to be in a low-temperature and low-pressure two-phase state, flow to the outdoor heat exchanger 32, evaporate, gasify, and return to the hermetic compressor 30 again through the four-way valve 31 and the accumulator 35. . That is, the refrigerant circulates as shown by the solid line arrows in FIG.

  Next, the cooling operation will be described. When the cooling operation is started, the four-way valve 31 is connected to the broken line side of FIG. After that, the pressure is reduced by the decompression device 33 to be in a low-temperature and low-pressure two-phase state, flow into the indoor heat exchanger 34, evaporate, gasify, and return to the hermetic compressor 30 again through the four-way valve 31 and the accumulator 35. . That is, when the heating operation is changed to the cooling operation, the indoor heat exchanger 34 is changed from the condenser to the evaporator, and the outdoor heat exchanger 32 is changed from the evaporator to the condenser.

  As described in the above embodiments 2 to 4, when a material with a large amount of oligomer extraction such as PET is used for insulating paper of a motor for a compressor, particularly a wedge, depending on the operation state, oligomers precipitated in the refrigerant may have a long period of time. If used, it may deposit on a four-way valve, an electric expansion valve, etc., and hinder the operation. In the present embodiment, these problems can be solved by using the hermetic compressor 30 described in the second to fourth embodiments.

  As described above, by using the hermetic compressors of Embodiments 2 to 4 in the refrigeration cycle of the air conditioner, a hermetic compressor with low oligomer extraction can be supplied without using large-scale equipment. The reliability of the refrigeration cycle of the air conditioner can be improved while suppressing costs.

Embodiment 6 FIG.
In the said Embodiment 5, although the hermetic compressor of Embodiments 2-4 demonstrated the example which the reliability as an air conditioner improved when it is integrated, for example in an air conditioner of a refrigerating air conditioner, An example of a refrigerator as a refrigeration air conditioner will be described.

  FIG. 13 is a schematic configuration diagram illustrating a refrigeration cycle of a refrigerator, for example. As shown in the drawing, in the refrigeration cycle, a hermetic compressor 50, a condenser 51, a capillary tube 52, an evaporator 53, and a check valve 54 are sequentially connected via a pipe.

  As described in the above embodiments 2 to 4, when a material with a large amount of oligomer extraction such as PET is used for insulating paper of a motor for a compressor, particularly a wedge, depending on the operation state, oligomers precipitated in the refrigerant may have a long period of time. In use, the capillary tube 52 may become clogged.

  In the present embodiment, these problems can be solved by using the hermetic compressor 50 described in the second to fourth embodiments.

  As described above, by using the hermetic compressors of Embodiments 2 to 4 in the refrigerator refrigeration cycle, it is possible to supply a hermetic compressor with a low oligomer extraction without using a large-scale facility, which reduces the cost. It can suppress and can improve the reliability of the refrigerating cycle of a refrigerator.

  As an example of a refrigeration air conditioner, an air conditioner and a refrigerator have been described. However, reliability can be improved by using the hermetic compressors of Embodiments 2 to 4 for other refrigeration air conditioners such as a dehumidifier. Can be improved.

  In the above-described embodiment, the motor having the slot opening on the inner diameter side of the stator has been described. However, the wedge of the first embodiment is also used for the motor having the slot opening on the outer diameter side of the stator. The same effect is obtained.

  Moreover, in the electric motor which winds a rotor, the wedge of Embodiment 1 may be used for a rotor, and there exists the same effect.

It is a figure which shows Embodiment 1 and is a plane sectional view of an electric motor. It is a figure which shows Embodiment 1, and is a side view which shows a part of electric motor in a cross section. FIG. 5 shows the first embodiment, and is an enlarged view of a slot portion. It is a figure which shows Embodiment 1 and is a perspective view which shows the shape of a wedge. It is a figure which shows Embodiment 1 and is a figure which shows the manufacturing method of a wedge. FIG. 5 shows the first embodiment, and is a flowchart showing a method for manufacturing a stator. It is a figure which shows Embodiment 1, and is a figure which shows the modification of the punch for wedge shaping | molding. It is a figure which shows Embodiment 1, and is a figure which shows the other modification of the punch for wedge shaping | molding. It is a figure which shows Embodiment 2, and is a longitudinal cross-sectional view of a scroll compressor. It is a figure which shows Embodiment 3, and is a longitudinal cross-sectional view of a rotary compressor. It is a figure which shows Embodiment 4, and is a side view of a reciprocating compressor. It is a figure which shows Embodiment 5, and is a schematic block diagram which shows the refrigerating cycle of an air conditioner. It is a figure which shows Embodiment 6, and is a schematic block diagram which shows the refrigerating cycle of a refrigerator.

Explanation of symbols

  1 Stator, 2 Rotor, 3 Stator Core, 4 Winding, 5 Slot, 6 Slot Cell, 7 Slot Opening, 8 Wedge, 9 Rotor Core, 10 Rotor Slot, 11 Fold, 12 Punch, 13 Die , 14 Magazine, 15 Fixed scroll, 15a Base plate part, 15b Plate-like spiral tooth, 15c Oldham guide groove, 15f Discharge port, 16 Oscillatory scroll, 16a Base plate part, 16b Plate-like spiral tooth, 16c Oscillating bearing, 16d Thrust surface, 16e Oldham guide groove, 16f Boss portion, 16h Boss outer diameter space, 16i Base plate outer peripheral space, 16j Bleed hole, 16k Lower opening, 17 Compliant frame, 17a Thrust bearing, 17c Main bearing, 17d Upper Fitting surface, 17e Lower fitting cylindrical surface, 17h Auxiliary main bearing, 17l Valve spring, 17m Spring, 17 p Intermediate pressure adjusting valve space, 17s communication hole, 17t valve, 18 main shaft, 18b swing shaft portion, 18c main shaft portion, 18d subshaft portion, 18f oil pipe, 19 subframe, 19a sub bearing, 20 Oldham mechanism portion, 20a Oscillation side key, 20b Oldham mechanism annular part, 20c fixed side key, 21 airtight container, 21a suction pipe, 23 check valve, 23a check valve spring, 25 guide frame, 25a upper fitting cylindrical surface, 25b lower fitting Cylindrical surface, 25f frame space, 26a, 26b sealing material, 30 hermetic compressor, 31 four-way valve, 32 outdoor heat exchanger, 33 decompression device, 34 indoor heat exchanger, 35 accumulator, coil end, 41 binding Thread, 50 Hermetic compressor, 51 Condenser, 52 Capillary tube, 53 Evaporator, 54 Check valve, 60 Electric Element, 70 compression element.

Claims (7)

A slot for winding a winding on an iron core formed by laminating thin steel plates, the slot having an opening on the inner diameter side or outer shape side of the iron core, and inserted so as to close the opening, or In an electric motor comprising a stator or a rotor having a wedge inserted between the windings of different phases inserted in the same slot,
An electric motor characterized in that a fold for forming the wedge into a predetermined shape is formed in an intermediate portion excluding the vicinity of both ends of the wedge.   The electric motor according to claim 1, wherein polyethylene naphthalate (hereinafter, PEN) is used as a material of the wedge. In a hermetic compressor containing an electric element having a stator and a rotor in a hermetic container, and a compression element driven thereby,
The electric element has a slot for winding a winding on an iron core formed by laminating thin steel plates, and the slot has an opening on the inner diameter side or outer shape side of the iron core, and is inserted so as to close the opening. In a motor having a stator or a rotor having a wedge inserted between the windings of different phases inserted in the same slot, a crease for forming the wedge into a predetermined shape A hermetic compressor formed in an intermediate portion excluding the vicinity of both end portions of the wedge.   The hermetic compressor according to claim 3, wherein PEN is used as a material for the wedge.   A refrigeration air conditioner using the hermetic compressor according to claim 3 or 4 in a refrigeration cycle. In the wedge inserted between the windings of different phases inserted in the slot of the motor or inserted in the same slot,
A wedge characterized in that a fold for forming into a predetermined shape is formed in an intermediate portion excluding the vicinity of both ends of the wedge. The material film is inserted between the punch and the die, pushed along the die by the punch, and inserted into the magazine, so that the folds in contact with the punch are plastically deformed and formed into a predetermined shape. In the method of manufacturing a wedge,
A method for manufacturing a wedge, wherein a longitudinal corner of the punch is dropped into a predetermined shape so that the crease is formed in an intermediate portion excluding the vicinity of both ends of the wedge.

Images